/*
 * Copyright 2025 LinQingYing. and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * The use of this source code is governed by the Apache License 2.0,
 * which allows users to freely use, modify, and distribute the code,
 * provided they adhere to the terms of the license.
 *
 * The software is provided "as-is", and the authors are not responsible for
 * any damages or issues arising from its use.
 *
 */

package org.cangnova.cangjie.types

import org.cangnova.cangjie.descriptors.ClassDescriptor
import org.cangnova.cangjie.descriptors.SupertypeLoopChecker
import org.cangnova.cangjie.descriptors.TypeParameterDescriptor
import org.cangnova.cangjie.resolve.DescriptorUtils
import org.cangnova.cangjie.resolve.builtIns
import org.cangnova.cangjie.storage.StorageManager

class ClassTypeConstructorImpl(
    private val classDescriptor: ClassDescriptor,
    parameters: List<TypeParameterDescriptor>,
    override val  supertypes: List<CangJieType>,
    storageManager: StorageManager
) : AbstractClassTypeConstructor(storageManager), TypeConstructor {

    override val parameters: List<TypeParameterDescriptor> = parameters.toList()

    override val isDenotable: Boolean = true

    override fun toString(): String = DescriptorUtils.getFqName(classDescriptor).asString()

    override val declarationDescriptor: ClassDescriptor = classDescriptor

    override fun computeSupertypes(): Collection<CangJieType> = supertypes

    override fun computeExtendSuperTypes(extendId: String?): Collection<CangJieType> {
        // Wiring skeleton: query ExtendManager capability if present
        // Note: current TypeConstructor API doesn't provide concrete type arguments here;
        // pass parameter default types as a conservative approximation.
        val module = declarationDescriptor.builtIns.builtInsModule
        val mgr = module.getCapability(org.cangnova.cangjie.resolve.extend.ExtendManager.CAPABILITY)
            ?: return emptyList()
        val args = parameters.map { it.defaultType }
        return mgr.getExtendSupertypes(this, args, extendId)
    }

    override val supertypeLoopChecker: SupertypeLoopChecker = SupertypeLoopChecker.EMPTY
}
